Cartridge for fire extinguishers and the like



Aug. 24 1926.

' F. E, KRAUSS CARTRIDGE FOR FIRE EXTINGUISHERS AND THE LIKE.

Filed Nov. '7, 1

Patented Aug, 24, 1926.

UNITED STATES 1,597,526 PATENT. OFFICE, Y

FRIEDRICH EMIL KRAUSS, OF SCHWARZENBERG, GERMANY.

CARTRIDGE FOR FIR-E'EXTINGUISHERS AND THE LIKE.

Applicatoin filed N 'ovember 7, 1923, Serial No. 673,365, and in Germany August 12, 1922.

This invention relates to a gas-developing cartridge, particularly for fire extinguishers, which operates independent from the extinguishing or other liquid and in which the substances serving for the generation of the gas, one of which is preferably in the dry state, in order to save space, are arranged concentrically. The improved cartridgeis so constructed that the'container for the acid or the like .is opened with absolute certainty and a choking of the cartridgeitselt is prevented. The ejection of the products of the reaction or free acid or the like from the cartridge is furthermore entirely excluded, as well as the danger of the cartridge exploding. Inasmuch as the gas producingchemicals of the improved cartridge do not at once come intoaction with their total quantity, as in" the known cartridges, but successively, the development of the gas also takes place gradually and in correspondence with the requirements and consequently the cartridge, which itself has a comparatively large air space, can be applied to extinguishers which for some reason or other have no air space of their own and by the application ot'ordinary cartridges would be exposedto the danger of an explosion.

The opening of the acid container, assuming it to be substantially cylindrical, take place by means of a .destructor whose action is based on the principle of inclined planes or wedges, which is operated by a strikingpin 'orthe like, preferably by the interc'alation of a body, which is variable inits shape without suffering destruction and which renders the employment of a stuliingbox for the striking pin unnecessary and at the same time forms a seal for the cartridge, between the, acid container and the striking-pin. By retaining this intermediate body other than eylindrical acid containers may equally well be opened by the striking-pin. y y

y A chokingot' the cartridge itself iseifecmay prevented by the provision of a pro- 1 tective, sheath and. a 'wiregauze cylinder at some distance around the acid, vessel or by the employment of granular alkali carbonate or bicarbonate or by mixingthe alkali with infusorial earth, quartz, chamotte or the like. versionor free acidfis prevented by anacid retainer 01 gas purifier or filters This d'eviceconsists of a. layer of granulated alkali.

The ejection of products of con- 1 substance and tablets or the like of suitable chemicals, such as alkali carbonate or bicarbonate disposed between wire I gauze sieves and provided with openings serving for the regulation of the passage'of. the gas.

There is no danger of the cartri-dgeitseif exploding for the reason that on the one hand, as already stated above, the gas generating substances come into action only gradually and successively, and on the oth its wayto the outlet and consequently no damage can be done. 7

The accompanying. drawing illustrat one embodiment of the invention by way of example.

carbonate or bicarbonate or other suitable Fig. 1 represents the improved cartridge 7 in longitudinal section, g

Fig. 2, an acid container so constructed that itmay be openedwithout a; special destructor, and

Fig. 3, the manner of fixing the improved cartridge within a fire extinguisher. 7

Referring to the drawing it will be seen, that the shell a of the cartridge contains in an axial arrangement-an acid container a, made of glass, for instance, whichis en- I closed by a protectivesheath e and a jacke I of wire gauze or the like, preferably with a little clearance.

The sheath e is somewhat shorter than the jacket 7, in order that after the opening of the vessel 02 the acidor the like issuing from it may first come 1n contact with a part of the second chemical 0 serving for the generation of the. gas. This chemical is, for instance, an alkali. carbonate or bicarbonate in the granulated state. To

the lower endrythe :Shellflf the cartridge is soldered a flanged sleeve b,.so as to arm a tightjoint, which is provided with an an nular contraction and a disc d of such shape, that its conhguration may be altered ,without destruction. Between thisdisc-d,

which .may for instance, consist of a sheet ofcorrugated lead and the vessel or container n is situated a destructor .0 of suitable shape extending over the end of the acid i i-l an acid container or a gas purifier. or :afilter.. is housed, which consists of a perforated dish 9 or disc which also contains 01' supports granulated alkali carbonateor bicarbonate and prevents any freeacid from issuing Thesame object is served by tablets 7c of alkali carbonate or the like dis posed above the dish 9 and a perforated -plate it between which gauze sieves 2' are arranged. 'These tablets or tabloids have recesses g and are. so piledup that these recesses are displaced in relation to each other or staggered and thus form channels through which the gas passes and deposits any admixtures of the other chemical. The

I .tablets are housed in a sheet iron' ring m or the l ke, which at the same tlme serves as distance plece between the perforated plate hcovering-the dish 9 and a second perforated plate 9. A tinfoil disc Z forms the upper seal of the cartridge.

The destructor 0 may be eliminated by providing the acid bottle near itslower end with a swelling "or enlargement T, which, as illustrated in Fig. 2 is situated between the contracted portion 39 of the flanged sleeve b and the disc at and which is destroyed, when the' striking-pin-acts upon the latter.

.. The gas development in thelower portion' of the cartridge enables bubbles of gas to enter into the" bottle 17/ and prevents the production of a vacuum in the latter which v would hinder the escape of the acid.

The gas generated after the destruction 7 jacket f, passes through the cleaner-or filter above described, collects in the chambers "until a'sufficient pressure is reached, then -tears the'tinfoil disc Z andenters the'shell *ofthe fireextinguisheror any other receptacle to be set under pressure. '.-'As' mentioned in the preamble the cor 'rugat ed =disc d renders theemployment 'of' ,a stuflingbox for the. striking-pin unnecessary, inasmucli asit forms apermanent gas-' tight seal evenafter its shape has been altered by the striking-pin. Thelcartridge may also be'p rojvided with a'flange t, as

passages and a disk of metal foil pin x, which need, however, not be packed by-a stuffing-box. This form of closure has one less joint requiring packing than will be foundin known sealing devices and is therefore less liable to leak.

What I claim as my invention and desire to secure by Letters Patent is:

1. A gas-developing cartridge for fireextinguishers, consisting of a substantially cylindrical closed shell a centralacid bottle within said shell, a short sheath around said bottle, a cylinder of wire gauze of larger diameter around said sheath and a solid chemical between said wire cylinder and said shell. I i

.2. A gas-developing cartridge for fire- ,extinguishers, consisting of a substantially cylindrical closed shell, a central acid bottle vwithin-said shell, a short sheath around said bottle, a cylinder of wire gauze of larger diameter around said sheath, a solidv chemical' between said wire cylinder .and said shell and a gas drying device, disposed coaxially at the discharge end of said shell.

.3. A gas-developing cartridge for fireextinguishers, consisting of a substantially cylindrical closed'shell a central. acidbottle within said shell, a short sheath around said bottle, a cylinder of wire gauze-of larger diameter around said sheath, a solid chemical between said wire cylinder and said shell and a gas drying device disposed coaxially at the discharge end of said shell,

said drying device consisting of a layer of loose reacting chemicals and tablets of such chemicals.

. 4:. A .gas-developing cartridge for fireextinguishers, consisting of a substantially cylindrical closed shell, a central acid bottle within said shell, a short sheath around said bottle, a cylinder of wire gauze of larger diameteraround said sheath, a solid chemical between said wire cylinder and 71 of the acid bottle ascends in the annular "space formed between the sheath 6 and the cylindrical closed shell, a central acid bottle within said shell, a short sheath around said bottle, a cylinder of wire gauze of larger diameter around said sheath, a solid chemical between said wire cylinder and 'sa-id shell and a gas drying device disposed coaxially shown in Fig. 3,.by means ofwhich itmayf be fixed in the charge opening of a fire extinguisher, a" packing ring obeing preferably inserted between thecontacting parts.

The charging openingof the. extinguisher closed in :the ordinary way by ac'a'p w, which atthe same time" guides the-striking atthe discharge end of said shell, said dryingchemi'cals and tablets of such chemicals, said tablets being disposed between wire gauze disks and provided with staggered gas a for closing the escape end ,of-said, shell.

6. A gas-developing cartridge for fireextinguishers, consisting of a substantially cylindrical closed shell, a central acid bottle within said shell, a short sheath around said bottle, a cylinder of wire gauze of larger diameter around said sheath, a solid chemical between said wire cylinder and said shell and a gas drying device disposed coaxially at the discharge end of said shell, said drying device consisting of a layer of loose reacting chemicals and tablets of such chemicals, said tablets being disposed between Wire gauze disks and provided with staggered gas passages, a disk of metal foil for closing the escape end of said shell and a disk adapted to be deformed by the striking-pin of the extinguisher and to destroy the said acid bottle.

7. A gas-developing cartridge for fireextinguishers, consisting of a substantially cylindrical closed shell, a central acid bottle within said shell, a short sheath around said bottle, a cylinder of wire gauze of larger diameter around said sheath, a solid chemical between said wire cylinder and said shell and a gas drying device disposed coaxially at the discharge end of said shell, said drying device consisting of a layer of loose reacting chemicals and tablets of such chemicals, said tablets being disposed between wire gauze disks and provided with staggered gas passages, a disk of metal foil for closing the escape end of said shell, a disk adapted to be deformed by the striking-pin of the extinguisher and a destructor upon the end of said acid bottle adaptedto be acted upon by said elastic disk and to desaid shell and a gas drying device disposed 1 coaxially at the discharge end m said shell,

said drying device consisting of a layer of loose reacting chemicals and tablets of such chemicals said tablets being disposed between wire gauze disks and provided with staggered gas passages, a disk of metal foil for closing the escape end of said shell, a disk adapted to be deformed by the strikingpin of the extinguisher and a destructor upon the end of said acid bottle adapted to be acted upon by said elastic disk and to destroy said acid bottle.

I afiix my signature.

FRIEDRICH EMIL KRAUSS- 

